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> Usa > Great Falls, Montana > Precipitation
Rainfall/ Precipitation in Great Falls, Montana, Usa
- Great Falls, Montana receives 386.3 mm (15.2 in) of rainfall per year, or 32.2 mm (1.3 in) per month.
- On average there are 94 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 7.8 days with a quantity of rain, sleet, snow etc. per month.
- The driest weather is in February when an average of 14.5 mm (0.6 in) of rainfall (precipitation) occurs.
- The wettest weather is in May when an average of 64 mm (2.5 in) of rainfall (precipitation) occurs.
Precipitation Table
| Climate Variable | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Average Precipitation mm (in) | 23.1 (0.91) | 14.5 (0.6) | 27.9 (1.1) | 35.8 (1.4) | 64 (2.5) | 60.7 (2.4) | 31.5 (1.2) | 39.1 (1.5) | 31.5 (1.2) | 19.8 (0.8) | 16.8 (0.7) | 21.6 (0.9) | 386.3 (15.2) | |
 | Precipitation Litres/m² (Gallons/ft²) | 23.1 (0.57) | 14.5 (0.36) | 27.9 (0.68) | 35.8 (0.88) | 64 (1.57) | 60.7 (1.49) | 31.5 (0.77) | 39.1 (0.96) | 31.5 (0.77) | 19.8 (0.49) | 16.8 (0.41) | 21.6 (0.53) | 386.3 (9.47) | |
 | Number of Wet Days (probability of rain on a day) | 7 (23%) | 7 (25%) | 9 (29%) | 8 (27%) | 10 (32%) | 13 (43%) | 7 (23%) | 7 (23%) | 7 (23%) | 6 (19%) | 7 (23%) | 6 (19%) | 94 (26%) | |
 | Percentage of Sunny (Cloudy) Daylight Hours | 59 (41) | 58 (42) | 72 (28) | 61 (39) | 65 (35) | 67 (33) | 80 (20) | 80 (20) | 71 (29) | 66 (34) | 47 (53) | 52 (48) | 67 (33) |